From: Lupi, Guy (Guy.Lupi@xxxxxxxxxxxxx)
Date: Wed Apr 03 2002 - 21:55:38 GMT-3
If you look at the config I just sent, if you put the secondary on an
interface that is not connected to the IGRP router, you can get the route in
there.
-----Original Message-----
From: Landon Fitts
To: ccielab@groupstudy.com
Sent: 4/3/2002 6:28 PM
Subject: Re: OSPF to IGRP redistribution (I know this has been killed, thi
s is short I promise)
It seems that although this topic has been beaten to death, it still
gives
some people lots of grief, including myself.
I have gotten this scenario to work with the "well-known" solutions:
using default-network in the IGRP domain, or using static routes in the
IGRP domain. For the OSPF domain, I have used summary-address into
the ospf domain at the asbr. However, these solutions all use some
form of default routing, so of course we want to be able to solve this
problem of redistribution between a classful and classless protocol
another
way.
I tried using secondary addressing on the link between the asbr and the
IGRP
only router, but still have not gotten that method to work. For instance
with Guy's
scenario if the link between R1 and R2 was network 150.100.1.0/24, and
you
wanted R2 to have reachability in it's route table to a network in the
OSPF
domain
that was 150.100.2.0/30, what secondary address network number would
allow
this to happen? I tried this using a secondary address of
150.100.3.0/30 as
well as
192.168.1.0/30, and I still couldn't see the 150.100.2.0/30 network in
R2's
route
table.
I know I was long-winded here, but I would like to get this nailed down,
and
I can't
find any examples on cco, doyle, etc. on how to resolve this using
secondary addresses,
tunnels, or route-maps.
Can anyone offer some short configs so that I can try for myself.
Regards,
Landon Fitts
CCNP, CCDP, NNCSE, NNCDE
l.fitts@mindspring.com
----- Original Message -----
From: "Warren J Dubose" <wdubose@cisco.com>
To: "Lupi, Guy" <Guy.Lupi@eurekaggn.com>
Cc: "'Mas Kato'" <loomis_towcar@speedracer.com>;
<ccielab@groupstudy.com>
Sent: Wednesday, April 03, 2002 5:13 PM
Subject: RE: OSPF to IGRP redistribution (I know this has been killed,
thi s
is short I promise)
> Guy,
>
> MAS is correct.
>
> How can r1 belong to 2 areas when it is connected to r1 talking IGRP?
>
> There are two types of summarization in ospf:
>
> Intra-area route summarization
> ---- summarization can occur at two points in an OSPF network at
> "AREA BORDERS", where ABRs can be configured to announce a single
Summary
> LSA for the range of networks residing within a "specific area"
>
> Inter-routing Domain Route Summarization
> --- on ASBRs at "route redistribution points" where ospf routes are
being
> exported to another routing protocol, or non-ospf routes are being
> imported into opsf.
>
> Check out Doyle's or Caslow's book pertaining to summarization of
OSPF.
> This should help ;)
>
> Regards,
> Warren
>
>
>
> On Wed, 3 Apr 2002, Lupi, Guy wrote:
>
> > Right, that is what I did, R1 is a member of 2 areas, area 1 and
area 0.
> > Here is a partial output of "show ip ospf". This is why I don't
understand
> > why it isn't working. I thought that as long as the router was an
ABR,
you
> > could use area range to summarize and inject into IGRP.
> >
> > r1#sh ip os
> > Routing Process "ospf 100" with ID 141.63.10.1 and Domain ID
0.0.0.100
> > Supports only single TOS(TOS0) routes
> > Supports opaque LSA
> > It is an area border and autonomous system boundary router
> >
> > -----Original Message-----
> > From: Mas Kato [mailto:loomis_towcar@speedracer.com]
> > Sent: Wednesday, April 03, 2002 4:30 PM
> > To: Lupi, Guy
> > Cc: ccielab@groupstudy.com
> > Subject: RE: OSPF to IGRP redistribution (I know this has been
killed,
> > this is short I promise)
> >
> >
> > Guy,
> >
> > Although router1 is certainly an ASBR, it really doesn't become an
ABR
until
> > it becomes a member of two or more OSPF areas. If you hung another
> > OSPF-speaking router off of router1 and placed it in an area
different
from
> > router5, you would then see the results of your 'area range' command
on
that
> > new router, because that new router would know how to read the type
3
> > summary LSAs being originated by router1.
> >
> > Regards,
> >
> > Mas Kato
> > https://ecardfile.com/id/mkato
> >
> > > "Lupi, Guy" <Guy.Lupi@eurekaggn.com> "'ccielab@groupstudy.com'"
> > <ccielab@groupstudy.com>Date: Wed, 3 Apr 2002 14:44:12 -0500
> > >Reply-To: "Lupi, Guy" <Guy.Lupi@eurekaggn.com>
> > >
> > >I know this has been covered in detail before, I just want to
verify
> > >something. I have the following:
> > >
> > >router2---------router1--------router5
> > >
> > >Router 5 and router 1 are OSPF, router 2 and router 1 is igrp only.
I
know
> > >how to use the secondary address, tunnel, and route-map methods. I
know
> > how
> > >to use summary address on router 1 to get connected routes that are
not
in
> > >OSPF onto router 2. I cannot get routes from router 5 to router 2
using
> > >area range on router 1. Router 1 is an ASBR, and an ABR. I cannot
use
the
> > >area range command to get the route from r5 to r2, and summary
address
> > would
> > >never work, but tunnels, route-maps, and secondary addresses work.
I
> > >thought that if the router was an ABR, you could do "area-range
[area
route
> > >is from] x.x.x.x x.x.x.x". Thanks.
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